Pulley-block.



R. H. WORRELL.

PULLEY BLOCK.

APPLICATION FILED FEB. 25, 19I4.

1 141,745 Patented June 1, 1915.

2 SHEETS-SHEET 1- R. H. WORRELL. PULLEY BLOCK.

APPLICATION FILED FEB. 25. 19M.

1,141,745 Patented June 1, 1915.

2 SHEETS-SHEET 2- ROBERT H. WORRELL, 0F SURVEYOR, WEST VIRGINIA,ASSIGNOE OF ONE-FOURTH TO JAMES H. MILLER, OF HINTON, WEST VIRGINIA, ANDONE-FOURTH T0 GEORGE W. JOHNSON, OF PARKERSBURG, WEST VIRGINIA.

PULLEY-BLOCK.

Specification of Letters Patent.

Patented June 1, 1915 Application filed February 25, 1914. Serial No.820,870.

To all whom it may concern:

Be it lmown that I, ROBERT H. WonRnLL, a citizen of the United States,residing at Surveyor, in the county of Raleigh and State of WestVirginia, have invented certain new and useful Improvements in PulleyBlocks; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in pulleyblocks and resides in the provision of a pulley block which is capableof withstanding rough usage, is lubricated in a novel manner andconstructed novelly and cheaply.

My pulley block may be adopted for various uses but is particularlydesigned for use in connection with lumbering camps. In lumbering campsthe pulley is used for dragging the logs and runs continuously, and inthis way is subjected to hard and rough usage, the pulleys oftenbecoming deranged or broken because of overheated bearings.

An important object of my invention is to provide a pulley block whereina lubricant will be automatically fedrto the bearings and thus preventoverheating thereof.

Another importantobject of my invention is to provide a simplyconstructed, light and durable pulley block which is assembled in such away as to prevent accidental derangement and insure, a reliableoperation.

My invention further aims to improve pulley blocks so as to render themmore practical, reliable and eflicient in operation, cheap tomanufacture and more commercially desirable.

The above and additional objects are ac-.

complished by such means as are illustrated in the accompanyingdrawings, described in the following specification and then moreparticularly pointed out in the claims which are appended hereto andform a part of this application. I r

l/Vith reference to the drawings, wherein I have illustrated thepreferred embodiment of my invention as it is reduced to practice, andthroughout the several views of which similar reference numeralsdesignate corresponding parts: Figure 1 is a side elevation of myimproved pulley block showing the hinged side of the block in openposition,

in dotted lines, Fig. 2 is a front elevation showing my device inassembled position,

Fig. 3 is a vertical sectional view taken centrally through the pulleyblock, Fig. 4 is a horizontal sectional view taken on line H of Fig. 1,Fig. 5 is a horizontal sectional v1ew taken on line 55 of Fig. 1, andFig. 6 is a plan view of one of the bearing rings removed.

Referring to the drawings, the numerals 1 and 2 designate the sideplates of the block. Each of these plates is provided with a cancavoconvex approximately circular body portion 3, so that the plates whenfitted together form a space sufliciently to journal the sheave to belater described. The body portion 3 of the plates are provided uponopposite sides with extension portions 4:- The plate 2 is hinged as at 5at a point approximately centrally of the ends of one of its extensionportions 4: and at the outer end of the extension portion is secured tothe outer end of the opposite extension portion of the plate 1 by meansof bolts or other suitable fastening means 6. It will thus be seen thatthe plate 2 may be swung into open positlon with relation to the plate 1and sheave carried thereby and to be later more fully described.

Swiveled as at 7 between the extensions 4 of the plates at the sidethereof adjacent to the hinge 5 is a securing ring or eye 8 of the usualtype employed.

The extension portion 4 on the plate 2 opposite to the one having thehinge 5 therein is provided with a lateral locking lug or tongue 9 thatis arranged to fit within an opening 10 in the opposite portion 4: ofthe plate 1. The tongue or lug 9 is apertured, said aperture beingadapted to aline with openings formed upon opposite sides of the opening10. A locking pin 11 having a head 12 is inserted through the openingsupon the opposite side of the opening 10 in the portion 4: of the plate1 and the opening in the tongue 9 to hold the tongue and plates inlocked position as clearly shown in Fig. 3 in the drawings. It will thusbe seen that the block may be securely locked in closed position orexpeditiously unlocked.

A hollow bearing pin having one end closed and designated 18 as anentirety is carried by the plate 1 centrally of the body portion 3thereof. A securing bolt 14 is inserted through the central portion ofthe closed end of the bearing pin 13 and central portion of the bodyportion 3 of the plate 1.

The unheaded screw threaded terminal of the bolt 14 is extended beyondthe outer surface of the body portion 3 of the plate 1" and has turnedthereon a suitable nut 15. The closed end .of the pin 13 is adapted tofit within a shallow circular recess 16 formed centrally of the innerface of the tion 3 of the plate 1. V

The body 30f the plate 2 constitutes a rebody porimovable closure forthe open end of the bearing pin'13 and is formed with a central recess17 in which the open end of said pin is wremovably seated.

A circular washer plate 18 is positioned within the recess 17 and isengaged with the open end of the'pin 13 to prevent the escape of thelubricant contained therein. A sheave 19 is rotatably 'mounted upon thepin 13 and a plurality of bearing rollers 20 are interposed between thesheave and the pin 13 toreduce friction.

I provide bearing retaining rings 21 and 22 that surround the pin 13 andengage the ends of the bearings 20. These rings 21 and 22 serve to.prevent accidental displacement of the bearing 20 and may be replacedfrom time to time as the movable parts of the pulley wear. The ringsfitwithin enlarged 1 which suitable lubricant may be contained. Aplurality of openings 25 are formed in the cap 27 isturned into theopening 26 to pre pin 13 and serve to enablethe lubricant to flow tothebearings 20. V

e As a means for filling the hollow bearing pin 13 with lubricant Iprovide an opening 26 formed through the central portion of the bodyportion 3 of the plate 2. 'This opening 26 communicates with a centralopening in the washer plate 18. If desired,

waste may be placed within the pin 13 and the lubricant may be pouredinto the pin 13 through the opening 26 described. A closure vent thelubricant from running out, of the pin 13. The washer plate 18 preventsunnecessary waste of the lubricant through leakage at the open end ofthe pin 13.

- 1t be readily seen the bearings 20 will be lubricated at all times anda hot 7 1 box is prevented.

It willbe readily seen :with;reference to the foregoing descriptionand'acoompanying drawingsthat I have provided a simple and inexpensivepulley block which is capable of performing all the functionshereinbefore recited in a reliable and expeditious manner.

The construction embodied in. my pulley block enables the device towithstand rough and continual usage without possibility of accidentalderangement; 1

In reductionto practice,

description,- as the preferred l embodiment, is

the mosteflicient and practical, yet realizing that the conditionsjconourrentwith the adoption of my devicewillnecessarily vary,

I desire to emphasize the fact thatvarious minor changes in details ofconstruction,

proportion and arrangement of parts? may be resorted to, when required,without sacrificing any of the advantages of my invention, as defined;in the appended claim.

What is claimed is r A pulley block comprising a pair ofllside 7 plateshingedly secured together and having central circularrecesses surroundedby annular grooves, a hollow cylindrical bearing pin having one endopen, means securing the'closed end of said bearing pin in the 7 1 meansthat the form of my invention, illustratedin the drawings and referredto in the above recess in one of said side plates, the opposite open endof said bearing pin being removably seated in the recess in theother'side.

open end of'saidbearing pin and the adjaplate, a washer plate interposedbetween the cent side plate, keys formed adjacent the.

' opposite ends of-said bearing pin, said bearing pin having a.plurality of'radial openings-therethrough, a pair of annular. bear 7 ingmembers seated. in said annular grooves and having recesses'thereln recevlng'said keys, a sheave rotatably mounted-upon said bearing pin, and aplurality of bearingr0ll 'ers interposed between said sheave and saidpin and between theannular bearing members of the pair.

In testimony whereof l'; affix signature in presence oftwo witnesses. p1 p Q a O R LL- ROBERT A Witnessest'Y I V 'RARDIN; I COOK."

Copies of this patent may be obtained for five cents each, by addressingthe f Commissioner of Patents, Y

- i Washington, D. 6.? a

